import numpy as np
from matplotlib import pyplot as plt

plt.rcParams["figure.figsize"] = [7.50, 3.50]
plt.rcParams["figure.autolayout"] = True

n = 100
x = np.random.rand(n)
y = np.random.rand(n)

plt.scatter(x, y, c=x)
plt.plot([0.1, 0.4, 0.3, 0.2])
plt.xlim(0, 1)

plt.show()